package com.example.dictdemo.aspect;


import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.parser.Feature;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.example.dictdemo.aspect.annotation.Dict;
import com.example.dictdemo.common.constant.CommonConstant;
import com.example.dictdemo.common.utils.ConvertUtils;
import com.example.dictdemo.model.vo.DictModel;
import com.example.dictdemo.model.vo.Result;
import com.example.dictdemo.service.CommonAPI;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @Description: 字典aop类
 * @Author: dlp
 * @Date: 2019-3-17 21:50
 * @Version: 1.0
 */
@Aspect
@Component
@Slf4j
public class DictAspect {
    @Lazy
    @Autowired
    private CommonAPI commonApi;
    @Autowired
    public RedisTemplate redisTemplate;

    @Autowired
    private ObjectMapper objectMapper;


    /**
     * 定义切点Pointcut
     */
    @Pointcut("(@within(org.springframework.web.bind.annotation.RestController) || " +
            "@within(org.springframework.stereotype.Controller) || @annotation(com.example.dictdemo.aspect.annotation.AutoDict)) " +
            "&& execution(public com.example.dictdemo.model.vo.Result com.example..*.*(..))")
    public void excudeService() {
    }

    @Around("excudeService()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        long time1 = System.currentTimeMillis();
        Object result = pjp.proceed();
        long time2 = System.currentTimeMillis();
        log.debug("获取JSON数据 耗时：" + (time2 - time1) + "ms");
        long start = System.currentTimeMillis();
        result = this.parseDictText(result);
        long end = System.currentTimeMillis();
        log.debug("注入字典到JSON数据  耗时" + (end - start) + "ms");
        return result;
    }

    /**
     * 本方法针对返回对象为Result 的IPage的分页列表数据进行动态字典注入
     * 字典注入实现 通过对实体类添加注解@dict 来标识需要的字典内容,字典分为单字典code即可 ，table字典 code table text配合使用与原来jeecg的用法相同
     * 示例为SysUser   字段为sex 添加了注解@Dict(dicCode = "sex") 会在字典服务立马查出来对应的text 然后在请求list的时候将这个字典text，已字段名称加_dictText形式返回到前端
     * 例输入当前返回值的就会多出一个sex_dictText字段
     * {
     * sex:1,
     * sex_dictText:"男"
     * }
     * 前端直接取值sext_dictText在table里面无需再进行前端的字典转换了
     * customRender:function (text) {
     * if(text==1){
     * return "男";
     * }else if(text==2){
     * return "女";
     * }else{
     * return text;
     * }
     * }
     * 目前vue是这么进行字典渲染到table上的多了就很麻烦了 这个直接在服务端渲染完成前端可以直接用
     *
     * @param result
     */
    private Object parseDictText(Object result) {
        if (((Result) result).getResult() instanceof IPage) {
            List<JSONObject> items = new ArrayList<>();

            //step.1 筛选出加了 Dict 注解的字段列表
            List<Field> dictFieldList = new ArrayList<>();
            // 字典数据列表， key = 字典code，value=数据列表
            Map<String, List<String>> dataListMap = new HashMap<>(5);
            //取出结果集
            List<Object> records = ((IPage) ((Result) result).getResult()).getRecords();
            //update-begin--Author:zyf -- Date:20220606 ----for：【VUEN-1230】 判断是否含有字典注解,没有注解返回-----
            Boolean hasDict = checkHasDict(records);
            if (!hasDict) {
                return result;
            }
            log.debug(" __ 进入字典翻译切面 DictAspect —— ");
            for (Object record : records) {
                String json = "{}";
                try {
                    json = objectMapper.writeValueAsString(record);
                } catch (JsonProcessingException e) {
                    log.error("json解析失败" + e.getMessage(), e);
                }
                JSONObject item = JSONObject.parseObject(json, Feature.OrderedField);

                // 遍历所有字段，把字典Code取出来，放到 map 里
                for (Field field : ConvertUtils.getAllFields(record)) {
                    String value = item.getString(field.getName());
                    if (ConvertUtils.isEmpty(value)) {
                        continue;
                    }
                    //解决继承实体字段无法翻译问题
                    if (field.getAnnotation(Dict.class) != null) {
                        if (!dictFieldList.contains(field)) {
                            dictFieldList.add(field);
                        }
                        String code = field.getAnnotation(Dict.class).dicCode();
                        String text = field.getAnnotation(Dict.class).dicText();
                        String table = field.getAnnotation(Dict.class).dictTable();
                        String dataSource = field.getAnnotation(Dict.class).ds();
                        List<String> dataList;
                        String dictCode = code;
                        if (StringUtils.isNotBlank(table)) {
                            dictCode = String.format("%s,%s,%s", table, text, code);
                            if (StringUtils.isNotBlank(dataSource)){
                                dictCode = String.format("%s,%s,%s,%s", table, text, code,dataSource);
                            }
                        }
                        dataList = dataListMap.computeIfAbsent(dictCode, k -> new ArrayList<>());
                        this.listAddAllDeduplicate(dataList, Arrays.asList(value.split(",")));
                    }
                }
                items.add(item);
            }

            //step.2 调用翻译方法，一次性翻译
            Map<String, List<DictModel>> translText = this.translateAllDict(dataListMap);

            //step.3 将翻译结果填充到返回结果里
            for (JSONObject record : items) {
                for (Field field : dictFieldList) {
                    String code = field.getAnnotation(Dict.class).dicCode();
                    String text = field.getAnnotation(Dict.class).dicText();
                    String table = field.getAnnotation(Dict.class).dictTable();
                    // 自定义的字典表数据源
                    String dataSource = field.getAnnotation(Dict.class).ds();
                    String fieldDictCode = code;
                    if (!StringUtils.isEmpty(table)) {
                        fieldDictCode = String.format("%s,%s,%s,%s", table, text, code, dataSource);
                    }

                    String value = record.getString(field.getName());
                    if (ConvertUtils.isNotEmpty(value)) {
                        List<DictModel> dictModels = translText.get(fieldDictCode);
                        if (dictModels == null || dictModels.size() == 0) {
                            continue;
                        }

                        String textValue = this.translDictText(dictModels, value);
                        log.debug(" 字典Val : " + textValue);
                        log.debug(" __翻译字典字段__ " + field.getName() + CommonConstant.DICT_TEXT_SUFFIX + "： " + textValue);

                        record.put(field.getName() + CommonConstant.DICT_TEXT_SUFFIX, textValue);
                    }
                }
            }
            ((IPage) ((Result) result).getResult()).setRecords(items);
        } else if (result instanceof Result) {
            Object object = ((Result) result).getResult();
            if (object == null || object instanceof Map
                    || object instanceof String
                    || object instanceof Integer
                    || object instanceof Boolean) {
                return result;
            }
            boolean canBeConverted = canBeConvertedToJson(object);
            if (!canBeConverted){
                return result;
            }
            String json = "{}";
            try {
                json = objectMapper.writeValueAsString(object);
            } catch (JsonProcessingException e) {
                log.error("json解析失败" + e.getMessage(), e);
            }
            JSONObject resultJsonObject = JSONObject.parseObject(json, Feature.OrderedField);
            for (Field field : ConvertUtils.getAllFields(object)) {
                if (field.getAnnotation(Dict.class) != null) {
                    String code = field.getAnnotation(Dict.class).dicCode();
                    String text = field.getAnnotation(Dict.class).dicText();
                    String table = field.getAnnotation(Dict.class).dictTable();
                    String ds = Optional.ofNullable(field.getAnnotation(Dict.class).ds()).orElse("");
                    String value = resultJsonObject.getString(field.getName());
                    if (ConvertUtils.isEmpty(value)) {
                        continue;
                    }
                    String textValue = translateDictValue(code, text, table, value,ds);
                    log.debug(" 字典Val : " + textValue);
                    log.debug(" __翻译字典字段__ " + field.getName() + CommonConstant.DICT_TEXT_SUFFIX + "： " + textValue);
                    resultJsonObject.put(field.getName() + CommonConstant.DICT_TEXT_SUFFIX, textValue);
                }
            }
            ((Result) result).setResult(resultJsonObject);
        }
        return result;
    }

    /**
     * list 去重添加
     */
    private void listAddAllDeduplicate(List<String> dataList, List<String> addList) {
        // 筛选出dataList中没有的数据
        List<String> filterList = addList.stream().filter(i -> !dataList.contains(i)).collect(Collectors.toList());
        dataList.addAll(filterList);
    }

    /**
     * 一次性把所有的字典都翻译了
     * 1.  所有的普通数据字典的所有数据只执行一次SQL
     * 2.  表字典相同的所有数据只执行一次SQL
     *
     * @param dataListMap
     * @return
     */
    private Map<String, List<DictModel>> translateAllDict(Map<String, List<String>> dataListMap) {
        // 翻译后的字典文本，key=dictCode
        Map<String, List<DictModel>> translText = new HashMap<>(5);
        // 需要翻译的数据（有些可以从redis缓存中获取，就不走数据库查询）
        List<String> needTranslData = new ArrayList<>();
        //step.1 先通过redis中获取缓存字典数据
        for (String dictCode : dataListMap.keySet()) {
            List<String> dataList = dataListMap.get(dictCode);
            if (dataList.isEmpty()) {
                continue;
            }
            // 表字典需要翻译的数据
            List<String> needTranslDataTable = new ArrayList<>();
            for (String s : dataList) {
                String data = s.trim();
                if (data.isEmpty()) {
                    continue; //跳过循环
                }
                if (dictCode.contains(",")) {
                    String keyString = String.format("sys:cache:dictTable::SimpleKey [%s,%s]", dictCode, data);
                    if (redisTemplate.hasKey(keyString)) {
                        try {
                            String text = ConvertUtils.getString(redisTemplate.opsForValue().get(keyString));
                            List<DictModel> list = translText.computeIfAbsent(dictCode, k -> new ArrayList<>());
                            list.add(new DictModel(data, text));
                        } catch (Exception e) {
                            log.warn(e.getMessage());
                        }
                    } else if (!needTranslDataTable.contains(data)) {
                        // 去重添加
                        needTranslDataTable.add(data);
                    }
                } else {
                    String keyString = String.format("sys:cache:dict::%s:%s", dictCode, data);
                    if (redisTemplate.hasKey(keyString)) {
                        try {
                            String text = ConvertUtils.getString(redisTemplate.opsForValue().get(keyString));
                            List<DictModel> list = translText.computeIfAbsent(dictCode, k -> new ArrayList<>());
                            list.add(new DictModel(data, text));
                        } catch (Exception e) {
                            log.warn(e.getMessage());
                        }
                    } else if (!needTranslData.contains(data)) {
                        // 去重添加
                        needTranslData.add(data);
                    }
                }
            }
            //step.2 调用数据库翻译表字典
            if (!needTranslDataTable.isEmpty()) {
                String[] arr = dictCode.split(",");
                String table = arr[0], text = arr[1], code = arr[2];
                String values = String.join(",", needTranslDataTable);
                // 自定义的数据源
                String dataSource = null;
                if (arr.length > 3) {
                    dataSource = arr[3];
                }
                log.debug("translateDictFromTableByKeys.dictCode:" + dictCode);
                log.debug("translateDictFromTableByKeys.values:" + values);
               if (null == dataSource) {
                    dataSource = "";
                }
                List<DictModel> texts = commonApi.translateDictFromTableByKeys(table, text, code, values, dataSource);
                log.debug("translateDictFromTableByKeys.result:" + texts);
                List<DictModel> list = translText.computeIfAbsent(dictCode, k -> new ArrayList<>());
                list.addAll(texts);

                // 做 redis 缓存
                for (DictModel dict : texts) {
                    String redisKey = String.format("sys:cache:dictTable::SimpleKey [%s,%s]", dictCode, dict.getValue());
                    try {
                        // 保留5分钟
                        redisTemplate.opsForValue().set(redisKey, dict.getText(), 300, TimeUnit.SECONDS);
                    } catch (Exception e) {
                        log.warn(e.getMessage(), e);
                    }
                }
            }
        }

        //step.3 调用数据库进行翻译普通字典
        if (needTranslData.size() > 0) {
            List<String> dictCodeList = Arrays.asList(dataListMap.keySet().toArray(new String[]{}));
            List<String> filterDictCodes = dictCodeList.stream().filter(key -> !key.contains(",")).collect(Collectors.toList());
            String dictCodes = String.join(",", filterDictCodes);
            String values = String.join(",", needTranslData);
            log.debug("translateManyDict.dictCodes:" + dictCodes);
            log.debug("translateManyDict.values:" + values);
            Map<String, List<DictModel>> manyDict = commonApi.translateManyDict(dictCodes, values);
            log.debug("translateManyDict.result:" + manyDict);
            for (String dictCode : manyDict.keySet()) {
                List<DictModel> list = translText.computeIfAbsent(dictCode, k -> new ArrayList<>());
                List<DictModel> newList = manyDict.get(dictCode);
                list.addAll(newList);

                // 做 redis 缓存
                for (DictModel dict : newList) {
                    String redisKey = String.format("sys:cache:dict::%s:%s", dictCode, dict.getValue());
                    try {
                        redisTemplate.opsForValue().set(redisKey, dict.getText());
                    } catch (Exception e) {
                        log.warn(e.getMessage(), e);
                    }
                }
            }
        }
        return translText;
    }

    /**
     * 字典值替换文本
     *
     * @param dictModels
     * @param values
     * @return
     */
    private String translDictText(List<DictModel> dictModels, String values) {
        List<String> result = new ArrayList<>();

        // 允许多个逗号分隔，允许传数组对象
        String[] splitVal = values.split(",");
        for (String val : splitVal) {
            String dictText = val;
            for (DictModel dict : dictModels) {
                if (val.equals(dict.getValue())) {
                    dictText = dict.getText();
                    break;
                }
            }
            result.add(dictText);
        }
        return String.join(",", result);
    }

    /**
     * 翻译字典文本
     *
     * @param code
     * @param text
     * @param table
     * @param key
     * @return
     */
    @Deprecated
    private String translateDictValue(String code, String text, String table, String key,String dataSource) {
        if (ConvertUtils.isEmpty(key)) {
            return null;
        }
        StringBuffer textValue = new StringBuffer();
        String[] keys = key.split(",");
        for (String k : keys) {
            String tmpValue = null;
            log.debug(" 字典 key : " + k);
            if (k.trim().isEmpty()) {
                continue; //跳过循环
            }
            if (!StringUtils.isEmpty(table)) {
                log.debug("--DictAspect------dicTable=" + table + " ,dicText= " + text + " ,dicCode=" + code+",dataSource="+dataSource);
                String keyString = String.format("sys:cache:dictTable::SimpleKey [%s,%s,%s,%s]", table, text, code, k.trim());
                if (org.apache.commons.lang3.StringUtils.isNotBlank(dataSource)){
                     keyString = String.format("sys:cache:dictTable::SimpleKey [%s,%s,%s,%s,%s]", table, text, code,dataSource, k.trim());
                }
                if (redisTemplate.hasKey(keyString)) {
                    try {
                        tmpValue = ConvertUtils.getString(redisTemplate.opsForValue().get(keyString));
                    } catch (Exception e) {
                        log.warn(e.getMessage());
                    }
                } else {
                    tmpValue = commonApi.translateDictFromTable(table, text, code, k.trim(),dataSource);
                    if (org.apache.commons.lang3.StringUtils.isNotEmpty(tmpValue)){
                        redisTemplate.opsForValue().set(keyString, tmpValue,300, TimeUnit.SECONDS);
                    }
                }
            } else {
                String keyString = String.format("sys:cache:dict::%s:%s", code, k.trim());
                if (redisTemplate.hasKey(keyString)) {
                    try {
                        tmpValue = ConvertUtils.getString(redisTemplate.opsForValue().get(keyString));
                    } catch (Exception e) {
                        log.warn(e.getMessage());
                    }
                } else {
                    tmpValue = commonApi.translateDict(code, k.trim());
                    if (org.apache.commons.lang3.StringUtils.isNotEmpty(tmpValue)){
                        redisTemplate.opsForValue().set(keyString, tmpValue,300, TimeUnit.SECONDS);
                    }
                }
            }
            if (tmpValue != null) {
                if (!"".equals(textValue.toString())) {
                    textValue.append(",");
                }
                textValue.append(tmpValue);
            }
        }
        return textValue.toString();
    }

    /**
     * 检测返回结果集中是否包含Dict注解
     *
     * @param records
     * @return
     */
    private Boolean checkHasDict(List<Object> records) {
        if (ConvertUtils.isNotEmpty(records) && !records.isEmpty()) {
            for (Field field : ConvertUtils.getAllFields(records.get(0))) {
                if (ConvertUtils.isNotEmpty(field.getAnnotation(Dict.class))) {
                    return true;
                }
            }
        }
        return false;
    }

    public static boolean canBeConvertedToJson(Object obj) {
        ObjectMapper objectMapper = new ObjectMapper();
        try {
            // 尝试将对象转换为 JSON 字符串
            objectMapper.writeValueAsString(obj);
            return true;
        } catch (JsonProcessingException e) {
            // 捕获 JSON 转换异常，返回 false
            return false;
        }
    }
}
